I would like to put up an isotropic antenna and compare it to my Yagis.
John KK9A
From: Randy Farmer [mailto:w8fn@windstream.net]
Sent: Thursday, October 21, 2021 2:31 PM
To: john@kk9a.com; towertalk@contesting.com
Subject: Re: [TowerTalk] SP7GXP antennas?
Sounds like they're specifying gain relative to isotropic, hence an extra 2.1
dB.
73...
Randy, W8FN
On 10/21/2021 10:38 AM, john@kk9a.com wrote:
I have modeled some OptiBeam antennas and the published specs seem accurate.
Of course getting 2db more gain from the same boom length would circumvent
the laws of physics. I recently installed a 4el 40m OptiBeam on my tower,
the SP6GXP version is 37% lighter.
John KK9A
David Gilbert AB7E wrote:
His 16 element 20/15/10 tribander looks like an almost complete copy of
my Optibeam OB16-3, except that SP6GXP claims about 2 db more gain on
each band and uses lighter weight materials.
Dave AB7E
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